Li Jingrong, Zuo Shufeng, Yang Peng, Qi Chenze
Zhejiang Key Laboratory of Alternative Technologies for Fine Chemicals Process, Shaoxing University, Shaoxing 312000, China.
Materials (Basel). 2017 Aug 15;10(8):949. doi: 10.3390/ma10080949.
A new functional AlNi-pillared clays (AlNi-PILC) with a large surface area and pore volume was synthesized. The performance of adsorption/desorption-catalytic combustion over CeOmodified Pd/AlNi-PILC catalysts was also studied. The results showed that the -value and specific surface area () of AlNi-PILC reached 2.11 nm and 374.8 m²/g, respectively. The large and the -value improved the high capacity for benzene adsorption. Also, the strong interaction between PdCe mixed oxides and AlNi-PILC led to the high dispersion of PdO and CeO₂ on the support, which was responsible for the high catalytic performance. Especially, 0.2% Pd/12.5% Ce/AlNi-PILC presented high performance for benzene combustion at 240 °C and high CO₂ selectivity. Also, the combustion temperatures were lower compared to the desorption temperatures, which demonstrated that it could accomplish benzene combustion during the desorption process. Furthermore, its activity did not decrease after continuous reaction for 1000 h in dry air, and it also displayed good resistance to water and the chlorinated compound, making it a promising catalytic material for the elimination of volatile organic compounds.
合成了一种具有大表面积和孔体积的新型功能性铝镍柱撑黏土（AlNi-PILC）。还研究了CeO改性的Pd/AlNi-PILC催化剂的吸附/脱附-催化燃烧性能。结果表明，AlNi-PILC的层间距和比表面积分别达到2.11nm和374.8m²/g。较大的层间距和层间距值提高了对苯的高吸附容量。此外，PdCe混合氧化物与AlNi-PILC之间的强相互作用导致PdO和CeO₂在载体上的高度分散，这是其高催化性能的原因。特别是，0.2%Pd/12.5%Ce/AlNi-PILC在240℃下对苯燃烧表现出高性能且具有高CO₂选择性。而且，燃烧温度低于脱附温度，这表明它可以在脱附过程中完成苯的燃烧。此外，在干燥空气中连续反应1000h后其活性没有降低，并且它对水和氯化化合物也表现出良好的抗性，使其成为一种有前途的用于消除挥发性有机化合物的催化材料。
